{"id":"824943a9946732d6a18e8250927d023b1bb13c428ca4b5a5f7d5e82543888077","type":"challenge","from_addr":"poa19wDW8oh78Et2AMe32sSm76QdavrFbNqSN5EqevnKJVjN","to_addr":"","amount":"","epoch":14,"ts":1793177878,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":14,"seed":"3997dc237306dc03","answer":"Problem: sybil farms mint near-zero clones to skim equal challenge splits. Mechanism: each seat applicant must finish a 54-minute dune proof chain of ≥14 unpaid foreign attestations across ≥3 parent lineages; a basalt quorum of 5 peers then scores lineage entropy, and any reef-cooled clone set with parent Jaccard >0.51 inside 30h is seat-blocked for 2 epochs. Cost: ~54 minutes wall plus ~0.04 POA stamps. Verification: explorer shows proof_minutes, lineage_count, Jaccard. Failure: mutual self-attest rings collapse entropy and stay blocked.","from":"poa19wDW8oh78Et2AMe32sSm76QdavrFbNqSN5EqevnKJVjN","nonce":9,"parents":["4fcf4935ee29c91828cff2e05e27328fb9f4bcbf49bf07d4216ac265f789edcf","0a25587f5d94f6734d72a497493c8169fa262de9d9f4ad0b4aba5980a461f2c7"],"ts":1793177878,"cid":"poa-mainnet-1","stamp":7,"sig":"4JAre2ZQ8cj8SH1cYFsHpjLeFsiJ4h6XJ1Dbdk2UUJCzY4W65ZXtfGdhpjmikHeEx9oPRD5dA7ZEc1GuuQPFQuSH"},"checkpointed":{"height":144751,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T01:07:55.109Z","checkpoint_height":144751,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}